2015 Audi S3 Problems

What owners report

Owners of this model year most often describe the passenger airbag switching off, or its warning light staying on, which they tie to the passenger occupant detection sensor in the seat. Many also describe waiting for recall repair parts, or warnings that return after a recall repair. Less often reported are shift micro-switch and park lock faults, refueling and fuel leak problems, and water pump failures.

1. 1
   Air bags

   Passenger airbag turns off or warning light stays on

   • 25 complaints (47%)
   • median 52,000 mi at 5.7 yrs old (11 state mileage)
   • owner-quoted repair $1,100 (median of 6 quotes)
   • filed 2018–2024

   Owners describe the passenger airbag turning off when someone is seated, or switching on and off on its own, usually with a warning light on the dash. Many link the problem to the passenger occupant detection sensor in the seat, and some also describe a seat-belt warning or a beeping alert at startup. Some owners say the dealer found the seat sensor faulty and quoted a paid repair, while others say the warnings continued after a repair. Where mileage is given, it ranges from about 20,000 to about 112,000 miles, and the warnings are described as intermittent or random.

   Recall 21V198000Recall 19V474000

   What to check: Ask whether either passenger occupant detection recall campaign applies to this VIN, and ask the dealer to check the passenger seat sensor for stored faults. On a test drive, check whether the passenger airbag light changes with and without someone in the seat.

   2 excerpts from owner complaints in NHTSA records

   “My car's passenger side front seat abruptly developed a sensor failure. The passenger airbag off light is lit, signaling the airbag won't deploy despite a passenger sitting in the seat. This is dangerous. There has been a recall issued in june 2018 on 140k Audi cars with similar problem, my model has yet to be included, and there are likely more cars with similar malfunction.”

   NHTSA complaint #11138921, filed 2018-10, 52,000 miles

   “My passenger seat airbag light started coming in randomly. I think it might be the sensor that sees if a small child is in the seat, in which case it turns off the airbag. But, when no one is in the seat, I get an alert every time I start the car, and it beeps for minutes. Plus, I think its telling me the airbag will not deploy if wrecked! My car is just out of warranty (4.5 years old, 39k miles)”

   NHTSA complaint #11222241, filed 2019-06, 39,000 miles
2. 2
   Air bags

   Recall repair parts delayed or fix did not last

   • 25 complaints (47%)
   • median 86,000 mi at 6.0 yrs old (9 state mileage, few)
   • owner-quoted repair $1,000 (median of 7 quotes)
   • filed 2019–2026

   Owners describe waiting for passenger airbag recall parts, and dealers have said the parts were not in stock or not available for several months. Some say the warnings returned months after a recall repair, and some were told the seat sensor was not covered by the recall. Some owners think their VIN should have been included, and others say they paid for a sensor repair after the recall work. One complaint says the manufacturer still had no solution several months after the recall was issued. Where mileage is given, it ranges from about 20,000 to about 112,000 miles, and the warnings are described as returning months after the repair.

   Recall 21V198000Recall 19V474000

   What to check: Ask the dealer for the completion record of any passenger airbag recall repair on this VIN, and whether any parts are still on order. Watch for passenger airbag or seat-belt warnings during a longer drive, since owners describe the warnings returning after repairs.

   2 excerpts from owner complaints in NHTSA records

   “Regarding: NHTSA campaign# 19v474000 recall# 69z4 vehicle was taking into Audi dealership in cuyahoga falls oh and completed the safety recall fix. 11 months later, the pods system indicated another circuit failure. Take back into same dealership and confirmed same safety recall failure. Would not honor the 12mth/12k warranty as I was about 5k miles past. They want about $700 to fix. I am deciding not to have them fix it. I have heard this problem keeps happening. …”

   NHTSA complaint #11377277, filed 2020-12, 112,000 miles

   “I got a passenger airbag off problem on the second year, and keep going back to dealership to check the problem until I got a recall notice. After having the passenger airbag sensor repaired recall, the car still comes up the same problem plus the passenger seatbelt off light up. The Audi dealership now tell me that the pods sensor is faulty and let me pay for its safety problems. I have no idea what have it done with my car after recall, and I feel really disappointed with Audi right now.”

   NHTSA complaint #11384201, filed 2020-12, 20,000 miles
3. 3
   Transmission and drivetrain

   Gear selector micro switch or park lock faults

   • 6 complaints (11%)
   • median 49,250 mi at 4.1 yrs old (2 state mileage, few)
   • filed 2017–2024

   Owners describe gear selector or park lock problems tied to a micro switch in the shift mechanism, including the shifter not coming out of park, the key being removable when not in park, and a park lock that does not hold. Some describe the car shifting out of gear on the highway or staying in first gear, and others say reverse did not engage or the car rolled without the parking brake. One owner reports a silicate build-up on the switch contacts, and a dealer note says the switch fails sporadically and the full shift mechanism needs replacement. Where mileage is given, it ranges from about 42,000 to about 60,000 miles, and the faults are described as sporadic.

   What to check: Ask whether the car has any park lock or shift-position fault codes stored, and whether the shift lever micro switch was checked or replaced. On a test drive, shift through all positions and confirm the car holds in park, engages reverse, and shows no neutral or gear-fault message.

   2 excerpts from owner complaints in NHTSA records

   “Highway driving and car felt as if it went into neutral. Several dash lights came on and car was only able to shift into first gear. I managed to safely get off the highway and avoid a disaster and / or accident. Had my vehicle towed to the dealership and they did nothing to the car after two days. Had my car towed to another Audi dealership and they also did nothing. Audi of america was no help as well.”

   NHTSA complaint #10983595, filed 2017-05, 56,500 miles

   “While driving the transmission goes out of gear completely leaving me sometimes stranded in the middle of a multilane highway unable to even move the car to a safe area. Sometime when I go to reverse out of a parking spot the reverse gear doesn't even engage, leaving me stuck for minutes at a time trying to turn the car on and off until it decides to go into reverse.”

   NHTSA complaint #11328601, filed 2020-06
4. 4
   Fuel system

   Refueling problems and fuel leaks from tank pump or valve

   • 7 complaints (13%)
   • typically at 11.4 yrs old
   • filed 2022–2026

   Owners describe the fuel pump shutting off repeatedly while refueling, with fuel backing up or spilling from the filler area, and in some cases a strong fuel odor at the pump. Others report fuel leaking from the tank area, including a faulty rollover valve, a jet pump seal, and fuel found on the ground after parking. One owner says a dealer quoted a full tank replacement, and another says a warranty extension was denied for this model. Mileage is not stated in these complaints, and the refueling problems are described as ongoing.

   What to check: When inspecting the car, smell for fuel near the tank area after a fill-up, and check whether the pump cuts off early while filling. Ask the dealer whether the jet pump seal, rollover valve, and EVAP suction pump have been inspected.

   2 excerpts from owner complaints in NHTSA records

   “While pumping gas, a strong odor is always present. While pumping gas the pump will stop multiple times before being filled in it's entirety, I can't hold depress gas pump handle I have to slowly fill car with gas or risk spilling fuel.”

   NHTSA complaint #11561473, filed 2023-12

   “Gas pump shuts off and stops pumping fuel into my car with a loud hissing noise before it shuts down the pump. I can not properly fill my vehicle with gas. This is not a single incident it is an ongoing problem.”

   NHTSA complaint #11726120, filed 2026-03
5. 5
   Engine

   Water pump failure and coolant leaks

   Mentioned in 4 of 50 sampled complaints

   Owners describe water pump failures and coolant leaks, including a leak found while the car was parked in a garage. One owner says the leak had been present for some time before the pump failed just after the warranty ended, and another says coolant entered the engine wiring harness and the engine lost ignition power. One complaint describes overheating and breakdowns, and an owner says the same engine has a known problem in other models with no recall for this model. Mileage is given for some of these complaints, from about 20,000 to about 95,000 miles, and some failures came shortly after a warranty ended.

   What to check: Ask whether the water pump, thermostat, and coolant valves have been replaced, and check the area around the pump for dried coolant residue. Ask for any warranty or repair records for the cooling system before buying.

   2 excerpts from owner complaints in NHTSA records

   “2015 Audi S3 water pump failed just after the warranty expired at 52k miles requiring $1500 in repairs. The water pump had been leaking through the weep hole for some time. Leak was discovered while car was stationary in garage. I would expect more from a quality perspective from a luxury brand like Audi. The mechanic that completed the repair specialized in Audi and volkswagens and told me he replaces 2-3 water pumps a week on Audi and volkswagen cars with this same engine. …”

   NHTSA complaint #11186594, filed 2019-03, 52,000 miles

   “Background: bought it used with 19,660 miles. The car was still under warranty for one year after purchase date. Multiple problems arise in the next few months: 1. Coolant leak due to failed water pump. (note: replaced under dealer's 4year/ 50k miles new vehicle limited warranty). 2. Multiple failed wheel bearing (one failed after the other). (note: one wheel bearing was replaced under above mentioned warranty but other wheel bearing(s) failed and no longer under warranty.”

   NHTSA complaint #11320903, filed 2020-04, 20,000 miles

Buying note. For this model year, ask whether the passenger airbag recall repair was completed on the VIN, and check the passenger airbag status with a scan before buying. Also ask for records of shift, fuel, and cooling system repairs, since owners report issues in each of these areas.

Summary written with AI from a sample of 50 NHTSA complaints for this model year (picked at random, with complaints that state a mileage and recent ones taken first), then checked automatically against the source records. Where a problem shows a complaint count, every complaint for this model year was matched with fixed keyword rules (written with AI and tested against the sample), and the mileage, age and repair figures are calculated from those complaints; owners' figures are as stated, not verified. Other counts refer to the sample. The excerpts come from NHTSA's public complaint records and are unverified; capitalisation is normalised, NHTSA staff notes are removed, and shortened text ends with “…”. Something wrong? Request a correction.